The modes are changed by using the display check
switches SW3 and SW4.
Normal Mode
The display will show one of the normal operation codes
as detailed in the following table.
Alarm Mode
When an alarm is activated the orange ALARM LED will
be on. Select the Alarm Mode on the display by pressing
and holding SW3 p and SW4 q simultaneously for 3
seconds.
Press SW3 p for 3 seconds to enter the alarm history
display. The unit can store up to 10 alarm occurences.
Press SW3 p or SW4 q to scroll through the alarms.
The display will automatically toggle (E) between the
alarm number and one of the alarm codes as detailed in
the alarm code table.
This example shows that alarm 10 was a system 1 high
pressure alarm and alarm 9 was a system 2 high
pressure alarm. See Alarm Codes, Pressure/
Temperature Settings and Safety and Control Device
Settings.
Parameter Settings Mode
To change from Normal to Parameter Settings mode
press and hold SW3 for 3 seconds. A small LED will light
in the lower right hand section of the display when
Parameter Settings mode is selected. To return to
Normal mode press and hold SW3 again for 3 seconds.
Press SW3 p or SW4 q to scroll through the
paramaeter settings. The display will show the
automatically toggle (E) between the parameter and the
parameter value.
6-2
035-21786-100 Rev. 1 (0909)
no 10
C1 H1
no 9
C2 H2
E
qp
E
No. 1 Comp. No.2 Comp.
C1-88 C2-88 Power supply present, System off
C1-Co C2-Co Unit in Cooling mode
C1-HE C2-HE Heating mode (heat pump option only)
C1-oF C2-oF Unit off - no cooling demand
Pu Pu Pump only operation
C1-E0 C2-E0 Initialising Electronic Expansion Valve
Display Code
Function
Normal Operating Mode
Alarm
History
Alarm
Mode
Parameter
Setting
Mode
2nd Water
Temperature
Setting Mode
SW3
SW3
SW4
SW4
SW3
00 00
C1 PdD 192
C2 PdD 192
C1 PSD 042
C2 PSD 042
C1 t dD 82
C2 t dD 82
C1 t SD -2
C2 t SD -2
qp
Suction Gas Temperature (°C): -2°C
qp
Discharge Gas Temperature (°C): 82°C
qp
Suction Gas Temperature (°C): -2°C
qp
Discharge Gas Temperature (°C): 82°C
qp
Suction Pressure (MPa): 0.42MPa
qp
Suction Pressure (MPa): 0.42MPa
Last Alarm Code (No Alarm)
Discharge Pressure (MPa): 1.92MPa
pq
qp
Discharge Pressure (MPa): 1.92MPa
qp
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